RHGL COMMERCIAL AIR HANDLERS NOMINAL 7.5 THROUGH 20 TON AIR CONDITIONING R-410A MODELS

Transcription

1 INSTALLATION INSTRUCTIONS RHGL COMMERCIAL AIR HANDLERS NOMINAL 7.5 THROUGH 20 TON AIR CONDITIONING R-410A MODELS SUPERSEDES

2 TABLE OF CONTENTS Introduction Checking Product Received Standard Unit Features Unit Dimensions Performance Data Physical Data Table Drive Package Data Indoor Blower Performance Optional Heater Kit Typical Low Voltage Connections Branch Circuit Conductor Data Field Installed Mixing Box Accessory Field Installed Mixing Box Dimensions Inspection, Location, Installation Refrigerant Piping Typical Piping Recommendations Condensate Drain Piping Motor Mounting, Motor Sheave, Fan Pulley Mounting Fan Belt Alignment and Adjustment Pre-Start Check List Operating Instructions Periodic Service and Maintenance Lubrication DRIVE PACKAGE TRADEBRAND nominal tons unit with side panel removed for coil connetions & air filter access nominal tons unit with side panel removed for blower and air filter access. 2 R

3 INTRODUCTION!! Recognize this symbol as an indication of Important Safety Information! WARNING PROPOSITION 65: THIS APPLIANCE CONTAINS FIBER- GLASS INSULATION. RESPIRABLE PARTICLES OF FIBER- GLASS ARE KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER. WARNING! THE MANUFACTURER S WARRANTY DOES NOT COVER ANY DAMAGE OR DEFECT TO THE AIR HANDLER CAUSED BY THE ATTACHMENT OR USE OF ANY COMPONENTS, ACCESSORIES OR DEVICES (OTHER THAN THOSE AUTHORIZED BY THE MANUFACTURER) INTO, ONTO OR IN CONJUNCTION WITH THE AIR HANDLER. YOU SHOULD BE AWARE THAT THE USE OF UNAUTHORIZED COMPO- NENTS, ACCESSORIES OR DEVICES MAY ADVERSELY AFFECT THE OPERATION OF THE AIR HANDLER AND MAY ALSO ENDANGER LIFE AND PROPERTY. THE MANUFAC- TURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS OR INJURY RESULTING FROM THE USE OF SUCH UNAU- THORIZED COMPONENTS, ACCESSORIES OR DEVICES. This booklet contains the installation and operating instructions for your air handler. There are a few precautions that should be taken to derive maximum satisfaction from it. Improper installation can result in unsatisfactory operation or dangerous conditions. Read this booklet and any instructions packaged with separate equipment required to make up the system prior to installation. Give this booklet to the owner and explain its provisions. The owner should retain this booklet for future reference. CHECKING PRODUCT RECEIVED Upon receiving the unit, inspect it for any damage from shipment. Claims for damage, either shipping or concealed, should be filed immediately with the shipping company. Check the unit model number and electrical characteristics to determine if they are correct. STANDARD UNIT FEATURES HORIZONTAL OR VERTICAL All models are designed for either application and can be installed in either position as supplied from the factory. MANIFOLD All models are furnished with dual circuit manifolds for dual condensing unit application. The circuitry is so arranged to provide full face coil operation from each unit. Fittings are provided with each unit for single condensing unit application. The fittings may be installed for either right or left hand tubing connections. DRAIN PAN (not visible) The zinc coated steel drain pan is designed to trap condensate in either vertical or horizontal installations. All pans are insulated with fiberglass insulation between the bottom of the pan and the unit and may be connected for either right or left hand drains. If unit is to be installed over a finished ceiling and in an unconditioned space, it is recommended an auxiliary drain pan be placed under the entire unit. PRODUCT SUITABLE FOR INDOOR USE ONLY. 3

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6 PERFORMANCE AHRI STANDARD CONDITIONS COOLING: RAWL- MODEL NUMBERS OUTDOOR UNIT RAWL- INDOOR COIL AND/OR AIR HANDLER TOTAL CAPACITY BTU/H [kw] 80 F [26.5 C] DB/67 F [19.5 C] WB INDOOR AIR 95 F [35 C] DB OUTDOOR AIR NET SENSIBLE BTU/H [kw] NET LATENT BTU/H [kw] EER SOUND RATING INDOOR CFM [L/s] Rev. 1/18/ CAZ RHGL-090Z 77,000 [22.6] 59,000 [17.3] 18,000 [5.3] ,600 [1227] 078DAZ RGHL-090Z 77,000 [22.6] 59,000 [17.3] 18,000 [5.3] ,600 [1227] 078YAZ RGHL-090Z 77,000 [22.6] 59,000 [17.3] 18,000 [5.3] ,600 [1227] 090CAZ RHGL-090Z 90,000 [26.4] 64,000 [18.8] 26,000 [7.6] ,800 [1321] RHGL-120Z 92,000 [27.0] 65,500 [19.2] 26,500 [7.8] ,800 [1321] 090DAZ RHGL-090Z 90,000 [26.4] 64,000 [18.8] 26,000 [7.6] ,800 [1321] RHGL-120Z 92,000 [27.0] 65,500 [19.2] 26,500 [7.8] ,800 [1321] 090YAZ RHGL-090Z 90,000 [26.4] 64,000 [18.8] 26,000 [7.6] ,800 [1321] RHGL-120Z 92,000 [27.0] 65,500 [19.2] 26,500 [7.8] ,800 [1321] Highest sales volume tested combination required by D.O.E. test procedures [ ] Designates Metric Conversions PERFORMANCE AHRI STANDARD CONDITIONS COOLING: RAWL- MODEL NUMBERS OUTDOOR UNIT RAWL- INDOOR COIL AND/OR AIR HANDLER TOTAL CAPACITY BTU/H [kw] 80 F [26.5 C] DB/67 F [19.5 C] WB INDOOR AIR 95 F [35 C] DB OUTDOOR AIR NET SENSIBLE BTU/H [kw] NET LATENT BTU/H [kw] EER IPLV SOUND RATING INDOOR CFM [L/s] Rev. 8/14/ CAZ RHGL-120Z 117,000 [34.3] 86,500 [25.3] 30,500 [8.9] N/A 88 3,800 [1793] RCCL-D ,000 [34.6] 86,500 [25.3] 31,500 [9.2] N/A 88 3,800 [1793] 120DAZ RHGL-120Z 117,000 [34.3] 86,500 [25.3] 30,500 [8.9] N/A 88 3,800 [1793] RCCL-D ,000 [34.6] 86,500 [25.3] 31,500 [9.2] N/A 88 3,800 [1793] 120YAZ RHGL-120Y 117,000 [34.3] 86,500 [25.3] 30,500 [8.9] N/A 88 3,800 [1793] RCCL-D ,000 [34.6] 86,500 [25.3] 31,500 [9.2] N/A 88 3,800 [1793] 125CAZ RHGL-120Z 116,000 [34.0] 87,000 [25.5] 29,000 [8.5] ,800 [1793] RCCL-D ,000 [34.0] 85,000 [24.9] 31,000 [9.2] ,800 [1793] 125DAZ RHGL-120Z 116,000 [34.0] 87,000 [25.5] 29,000 [8.5] ,800 [1793] RCCL-D ,000 [34.0] 85,000 [24.9] 31,000 [9.2] ,800 [1793] 125YAZ RHGL-120Y 116,000 [34.0] 87,000 [25.5] 29,000 [8.5] ,800 [1793] RCCL-D ,000 [34.0] 85,000 [24.9] 31,000 [9.2] ,800 [1793] 150CAZ RHGL-180Z 146,000 [42.8] 112,000 [32.8] 34,000 [10.0] ,000 [2360] 150DAZ RHGL-180Z 146,000 [42.8] 112,000 [32.8] 34,000 [10.0] ,000 [2360] 150YAZ RHGL-180Y 146,000 [42.8] 112,000 [32.8] 34,000 [10.0] ,000 [2360] 180CAZ RHGL-180Z 178,000 [52.2] 125,000 [36.6] 53,000 [15.5] ,100 [2407] 180DAZ RHGL-180Z 178,000 [52.2] 125,000 [36.6] 53,000 [15.5] ,100 [2407] 180YAZ RHGL-180Y 178,000 [52.2] 125,000 [36.6] 53,000 [15.5] ,100 [2407] 240CAZ RHGL-240Z 244,000 [71.5] 169,000 [49.5] 75,000 [22.0] ,900 [3256] 240DAZ RHGL-240Z 244,000 [71.5] 169,000 [49.5] 75,000 [22.0] ,900 [3256] 240YAZ RHGL-240Y 244,000 [71.5] 169,000 [49.5] 75,000 [22.0] ,900 [3256] Highest sales volume tested combination required by D.O.E. test procedures N/A = Not applicable [ ] Designates Metric Conversions 6

7 PERFORMANCE AHRI STANDARD CONDITIONS COOLING: RANL- MODEL NUMBERS OUTDOOR UNIT 2-RANL- INDOOR COIL AND/OR AIR HANDLER TOTAL CAPACITY BTU/H [kw] 80 F [26.5 C] DB / 67 F [19.5 C] WB INDOOR AIR 95 F [35 C] DB OUTDOOR AIR NET SENSIBLE BTU/H [kw] NET LATENT BTU/H [kw] EER IEER SOUND RATING INDOOR CFM [L/s] Rev. 6/20/ CAZ RHGL-090Z [22.3] [16.1] [6.2] [1133] 037DAZ RHGL-090Z [22.3] [16.1] [6.2] [1133] 037JAZ RHGL-090H [22.3] [16.1] [6.2] [1133] 049CAZ RHGL-090Z [27.5] [20.8] [6.7] [1510] RHGL-120Z [28.4] [21.7] [6.7] [1510] 049DAZ RHGL-090Z [27.5] [20.8] [6.7] [1510] RHGL-120Z [28.4] [21.7] [6.7] [1510] 049JAZ RHGL-090H [27.5] [20.8] [6.7] [1510] RHGL-120H [28.4] [21.7] [6.7] [1510] 049JEZ RHGL-090H [27.5] [20.8] [6.7] [1510] RHGL-120H [28.4] [21.7] [6.7] [1510] PERFORMANCE AHRI STANDARD CONDITIONS COOLING: RAPM- MODEL NUMBERS OUTDOOR UNIT 2-RAPM- INDOOR COIL AND/OR AIR HANDLER TOTAL CAPACITY BTU/H [kw] 80 F [26.5 C] DB / 67 F [19.5 C] WB INDOOR AIR 95 F [35 C] DB OUTDOOR AIR NET SENSIBLE BTU/H [kw] NET LATENT BTU/H [kw] EER IEER SOUND RATING INDOOR CFM [L/s] Rev. 6/20/ JAZ RHGL-120H [34.0] [25.2] [8.8] [1793] 060JEZ RHGL-120H [34.0] [25.2] [8.8] [1793] Highest sales volume tested combination required by D.O.E. test procedures [ ] Designates Metric Conversions 7

8 PHYSICAL DATA TABLE MODEL NO. RHGL- Cooling Size Nominal Size (tons) Nominal Rated E.S.P. Standard 3450 RPM 1 phase 1 HP 2 HP MOTOR HORSEPOWER 1750 RPM 3 phase 1 HP HP 2 HP 5 HP Optional 1750 RPM 3 phase HP, 2 HP 2 HP, 3 HP 3 HP, 5 HP HP Blower Size diameter x width 12 x x x x 18 Blower Shaft Diameter Blower Sheave Diameter (Std.) Motor Sheave Size 3450 RPM 1 phase Adjustment (Std.) 1750 RPM 3 phase Belt Type & Size Std. A-53 A-53 B-52 B-52 Coil Face Area (sq. ft.) Coil Tube Dia Coil, Rows Deep-Fins Per Inch 3/15 4/15 3/13 4/15 T.X. Valve Refrigerant Control (2) BBIZE-3-GA (2) CBBIZE-5-GA (2) BBIZE-6-GA (2) BBIZE-8-GA Filter Size (std.)* No. Req d (4) 16 x 25 x 1 (4) 16 x 25 x 1 (6) 20 x 25 x 1 (6) 20 x 25 x 1 CABINET: Finish Powder Paint Powder Paint Powder Paint Powder Paint Sheet Metal Galvanized Galvanized Galvanized Galvanized Gauge; Top Gauge; Sides Gauge; Bottom Gauge; Doors and Covers 20 min. 20 min. 20 min. 20 min. UNIT WEIGHTS: Operating Shipping OPTIONAL ACCESSORIES WEIGHTS: Hot Water Coils Steam Heating Coils *Unit will accept 2 filters. DRIVE PACKAGE DATA 3 PH SHEAVE SELECTIONS* MOTOR APPROXIMATE BLOWER MOTOR SHEAVE TURNS OPEN DRIVE MOTOR BLOWER HP / PH K / L /2 / M /2 / NK / K /2 / L / M / NI / O / K / L / M / N# / K / L / M / PH SHEAVE SELECTIONS* MOTOR APPROXIMATE BLOWER MOTOR SHEAVE TURNS OPEN DRIVE MOTOR BLOWER HP / PH /2 K / K / NOMINAL TONS NOMINAL TONS *Actual pitch diameter in inches. Minimum and maximum pitch diameter shown for adjustable motor sheave. K Field supplied (Motor Sheave: Browning IVP75, Blower Sheave: Browning AZ100, Belt: A-50, Motor: 2 HP, 4 Pole, 3 ) I Field Supplied (Motor Sheave: Browning IVP75, Blower Sheave: Browning AZ80, Belt: A-50) Field Supplied (Motor Sheave: Browning IVP75, Blower Sheave: Browning AZ90, Belt: A-54) # Field Supplied (Motor Sheave: Browning IVP65, Blower Sheave: Browning BK110, Belt: B-50) 8

9 INDOOR BLOWER PERFORMANCE 7.5 TON (DRY COIL) DRIVE PKG K L M N STD CFM.1 RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W K 090 Z E.S.P. INCHES OF WATER L RPM W RPM W RPM W RPM W RPM W RPM W M RPM W RPM W RPM W RPM W RPM W N K = IVP50, AZ100, 1 HP L = IVP60, AZ100, 1 1 /2 HP M = IVP68, AZ100, 1 1 /2 HP N = [ IVP75, AZ100, Belt A-50, 2 HP] Field Supplied DRIV E PKG K 090 HK E.S.P. INCHES OF WATER STD CFM R PM RPM W RPM W RPM W RPM W RPM W R P M W RPM RPM RPM RPM RPM RPM R PM W W W W W W W RPM R P M W T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. W W R P M R P M W W R P M R PM T.O. T.O. T.O. T.O. T.O. W T.O. W T.O. T.O. T.O. T.O. T.O K = IVP34, AZ100, 1 HP 1 NOTE: T.O. = Turns Open NOTES: 1. Standard Lbs./Ft Code: 2. Operation below heavy lines require optional L drive. BHP = Brake Horsepower 3. Motor efficiency =.85 RPM = Blower Speed 4. BHP = Watts x Motor Efficiency 746 9

10 INDOOR BLOWER PERFORMANCE 10 TON (DRY COIL) DRIVE PKG K L M N O STD CFM K L 90 Z & 120 Z E.S.P. INCHES OF WATER RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W RPM W M N O K=IVP56, AZ100, 1 1 / 2 HP L=IVP68, AZ100, 2 HP M=IVP68, AZ100, 3 HP N=[IVP65, AZ80, 3 HP] Field Supplied O=[IVP75, AZ90, 3 HP] Field Supplied DRIVE PKG K 90 & 120 HK E.S.P. INCHES OF WATER STD CFM RPM W RPM RPM W W RPM RPM W W RPM RPM W W RPM RPM RPM W W RPM W RPM RPM RPM W W W RPM RPM RPM RPM RPM RPM W W T.O. W W W W W T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O. T.O K=IVP34, AZ90, 2 HP 1 NOTE: T.O. = Turns Open NOTES: 1. Standard Lbs./Ft Code: 2. Operation below heavy lines require optional L drive. BHP = Brake Horsepower 3. Motor efficiency =.85 RPM = Blower Speed 4. BHP = Watts x Motor Efficiency

11 INDOOR BLOWER PERFORMANCE 15 & 20 TON (DRY COIL) 180Z E.S.P. INCHES OF WATER D R IV E PKG K L M-N STD CFM.1 RPM W R PM W RPM W RP M W R PM W RPM W R P M W R PM W RP M W K K = IVP44, BK120, 2 HP L = IVP50, BK120, 3 HP M = IVP50, BK100, 5 HP N = [IVP65, BK110, 5 HP] Field Supplied RPM W R P M W RP M W R P M W R P M W R PM W L RPM W RP M W RP M W RPM W RPM W M N D RIVE PKG K L M STD CFM.1 RPM W R PM W RP M W R PM W R PM W RPM W RP M W R PM W RP M W K Z E.S.P. INCHES OF WATER RPM W RPM W R P M W RPM W R P M W R P M W L R PM W R PM W RPM W RPM W R PM W M K = I VP60, BK120, 5 HP L = 2VP60, 2BK110, 7 1 /2 HP M = 2VP60, 2BK100, 7 1 /2 HP NOTES: 1. Standard Lbs./Ft Code: 2. Operation below heavy lines require optional L drive. BHP = Brake Horsepower 3. Motor efficiency =.85 RPM = Blower Speed 4. BHP = Watts x Motor Efficiency

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17 TYPICAL LOW VOLTAGE CONNECTIONS (Low Voltage) HEATER KIT (OPTIONAL) W2 BR HC2 W1 BK HC1 L O W V O LT A G E T H E R M OS T A T Y2 Y1 G YL PU BC LC1 LC2 C BRANCH CIRCUIT CONDUCTOR DATA (HIGH VOLTAGE) Air Handler Recommended Motor Rating Motor Minimum Minimum Cu Max Horsepower, Volts, Plate LRA Circuit Wire Size/Max Fuse or Ø Amps Ampacity Run in Feet Breakers 1, 208/230, 3 ø 4.0/ / #14/ , 460, 3 ø #14/ , 575, 3 ø #14/ , 115/230, 1 ø 16/8 96/48 20/15 #12/120/#14/180 20/ , 208/230, 3 ø 5.7/ / #14/ , 460, 3 ø #14/ , 575, 3 ø #14/ , 208/230, 3 7.5/6/8 45.1/ #14/ , 460, 3 ø #14/ , 575, 3 ø #14/ , 115/230, 1 ø 24/12 144/72 30/15 #10/140 #14/120 30/15 3, 208/230, 3 ø 10.6/ /58 15 #14/ , 460, 3 ø #14/ , 575, 3 ø #14/ , 208/230, 3 ø 16.7/ /91 21/19 #10/240 #12/150 25/20 5, 460, 3 ø #14/ , 575, 3 ø #14/ , 208/230, 3 ø 24.2/ /132 30/28 #10/150 30/ , 460, 3 ø #14/ , 575, 3 ø #14/

18 FIELD INSTALLED MIXING BOX ACCESSORY 71/2 AND 10 ACCESSORY MODEL RXHM-BC74H 15 AND 20 ACCESSORY MODEL RXHM-BC76H COOLING SEASON Thermostat set at Cool and Fan Auto, outside air damper goes to minimum fresh air position when cooling thermostat closes, energizing mechanical cooling. When cooling thermostat is satisfied, mechanical cooling is de-energized, and outside air damper closes. INTERMEDIATE SEASON Same as for cooling season, except that cooling thermostat closes, starting indoor blower motor, the enthalpy control, mounted on outside air, determines if free cooling or mechanical cooling should be utilized. If outside air conditions are suitable for cooling, the mechanical cooling remains off and the mixed air controller modulates the damper motor to assume the proper damper position to maintain mixed air setting. If outside conditions are not suitable for cooling, then the dampers go to minimum fresh air position and mechanical cooling is energized. HEATING SEASON Damper always stays at minimum fresh air position while fan motor is operating. Outside air damper closes when blower motor is off. Minimum fresh air position must not allow mixed air temperatures to air handler below 50 F. during heating seasons. CAUTION: Because of the possibility of freeze damage, it is not recommended that hot water or steam coils be used with the mixing box accessory, unless provision is made to shut-off the outside air duct 100% during freezing conditions. Another possible system enhancement would be to install an air proving switch in the air handler supply duct wired in series with the compressor contactor coil (24V) which would lock out the compressor in the event of air flow failure. 18

19 Field - Installed Mixing Box Dimensions A TOP VIEW B ENTHALPY CONTROL C D FRONT VIEW E F G H SIDE VIEW MODEL# A B C D E F G H (-)XHM-BC74H 47 ¾ ½ (-)XHM-BC76H 55 ¾ ½ Flanged Duct Opening Length Width " " " " ST-A X0 19

20 INSPECTION The complete unit should be examined thoroughly upon receipt, for either hidden or apparent damage, and if necessary, a claim should be entered at once against the last carrier. It is the responsibility of the consignee to file such a claim since the unit is shipped F.O.B. Factory. LOCATION The location of the unit must be determined with the following factors in mind: available electric power, plumbing facilities and ample space for arranging the refrigeration equipment, and conforming with proper duct design. In addition, provision should also be made for accessibility to service parts and for complete removal and replacement of any replaceable part. INSTALLATION The construction of the building must be substantial enough to support the unit. Set the air handler on a suitable foundation so that the weight is evenly distributed. After locating the unit, shim up the side opposite the drain to allow the water to drain from the pan. If return air duct is not used, applicable installation codes may limit this cabinet to single story buildings only. See example of both vertical and horizontal mounting. The units may also be suspended from the ceiling. Supply conduit to equipment must terminate at junction box located in the unit. NOTE: When installed in horizontal position, drain end must be 1/2 lower than leaving air end. PRODUCT SUITABLE FOR INDOOR USE ONLY. REFRIGERANT PIPING The following will be of help in accomplishing a successful installation. 1. Size liquid line for no more than 50 PSIG pressure drop. 2. Size suction lines for no more than 2 F loss which corresponds to approximately 5 PSIG pressure drop. 3. When evaporator is installed below condensing unit, do not exceed the recommended suction line O.D. This will insure adequate velocities for proper oil return. 4. Install (optional field installed) sight glass in liquid line. 5. Pitch all horizontal suction lines downward in the direction of flow. 6. When making up refrigerant piping, take every precaution to prevent dirt and moisture from entering the piping. 7. Locate the condensing unit and evaporator(s) as close together as possible to minimize piping runs. NOTE: Refer to suction and liquid line pressure drop charts found in condensing unit literature. EQUIV. LENGTH TO EVAP. (FT.) PIPING SIZES TONS (INCHES) LIQUID LINE O.D. SUCTION LINE O.D EQUIV. LENGTH TO EVAP. (FT.) PIPING SIZES TONS (INCHES) LIQUID LINE O.D. SUCTION LINE O.D RHGL TON [26-70 kw] TX VALVES SINGLE CIRCUIT MANIFOLD REFRIGERANT CONNECTION EITHER SIDE RHGL TON [26-70 kw] 20

21 CONDENSATE DRAIN PIPING Two drain couplings are provided on all models. Select either one for condensate outlet and plug the other. Consult local codes or ordinances for specific requirements regarding condensate drain. Condensate drain is open to atmosphere and must be trapped. Trap must be at least 3 inches deep and made of flexible material or fabricated to prevent freeze-up. If air handler is installed in a non-conditioned space, it is recommended an auxiliary drain pan be fabricated and installed under entire unit. Pitch the drain line at least 1/4 inch per foot away from the drain pan. Do not reduce the drain line size from the connection size provided on the unit. Do not connect the drain line to a closed sewer line. 21

22 MOTOR MOUNTING One of the most critical aspects of an air handler installation is the mounting of the motor, motor sheave, fan pulley and the belts, and the adjustment of these items. The motor base for the air handlers is raised or lowered by means of the adjusting hex nuts. MOTOR SHEAVE AND FAN PULLEY MOUNTING AND ADJUSTMENT The adjustable pitch sheave which is mounted on the motor shaft controls the fan speed. To adjust the fan speed refer to figure at right, proceed as follows: a. Loosen the set screw, item 1. b. Rotate the adjustable sheave, item 2, to the desired position. c. Lock the adjustable sheave in place by tightening the set screw, item 1. NOTE: The adjustable sheave is not to be used to adjust belt tension. WARNING BEFORE MAKING FAN ADJUSTMENTS, BE SURE THE MAIN ELECTRICAL DISCONNECT SWITCH IS IN THE OFF POSITION TO PREVENT POSSIBLE INJURY DUE TO ACCIDENTAL OPERATION OF THE MOTOR. FAN BELT ALIGNMENT AND ADJUSTMENT Place belt on the groove of the fan pulley and motor sheave to obtain the approximate alignment and belt tension. Remove the belt and align the fan pulley and motor sheave using a straight edge. When the pulley and sheave are properly aligned, re-install belt. Do not force or pry the belt onto the pulley and sheave. With the belt in place, adjust so that all the slack is on one side of the drive. The belt should have from 3/4 to 1 of slack at 3 lbs. pressure. Adjust the belt to this tension, by raising or lowering the swing base via the adjusting rods and nuts. PRE-START CHECK LIST 1. Leak test entire system. 2. Check motor mounting to make sure all nuts are tight. 3. Check motor sheave and fan pulley to make sure they are in proper alignment and set screws are tight. 4. Check belt tension belts should be fairly tight for the initial start-up. 5. Check bearing collar set screws on fan shaft to make sure they are tight. 6. Ball type bearings are factory lubricated and do not require additional grease before starting. 7. Rotate blower shaft by hand to be sure it is free. 8. Check motor and fan rotation. 9. Check all screws, bolts, set screws and piping connections for tightness. 10. Check drain. 11. Insure that filters are in place. 12. Insure all manual valves are open. 13. Be sure that electrical controls and motors are properly wired and fused in accordance with applicable codes. 14. Check wheel position in scrolls. See Figure 1 a and b. 22

23 OPERATING INSTRUCTIONS 1. Start fan motor immediately observe noise level and secure fan motor if unusual sound is heard. Check bearings in particular for proper noise level and temperature. Be sure fans do not rub on scrolls. 2. Check fan RPM and adjust as necessary. 3. Check for motor overloading. 4. Check for proper CFM delivery. 5. Check all necessary items and controls for proper operation. 6. Insure that condensate is being properly discharged from drain pan. PERIODIC SERVICE AND MAINTENANCE 1. Filters Dirty filters reduce air flow and, in turn, the capacity of the unit. Therefore, when dirty, replace or clean, depending on the type. 2. Coils Dirt should not be permitted to build up on the fins of the coils. An air stream or water jet can be used to remove dirt and lint. 3. Check all moving parts for wear and alignment every six (6) months. 4. Check bearing-collar set screws on fan shaft to make sure they are still tight. Do this at least every six months. THIS IS VERY IMPORTANT.! WARNING BEFORE PERFORMING PERIODIC SERVICE AND MAINTENANCE, BE SURE THE MAIN ELECTRICAL DISCONNECT SWITCH IS IN THE OFF POSITION TO PREVENT POSSIBLE INJURY DUE TO ACCIDENTAL OPERATION OF THE MOTOR. LUBRICATION GREASING BALL BEARINGS MOTORS All ball bearing motors are prelubricated and do not require the addition of grease at time of installation. However, periodic cleaning out and renewal of grease in ball bearings is necessary. Please note that extreme care must be exercised to prevent foreign matter from entering the bearing. 23

24 24 CM 1116